Home / 77,287.20-116,103.60-74,138.40

Finding the Fourth Proportional to 77,287.20, 116,103.60 and 74,138.40

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Solution

The fourth proportional to 77,287.20, 116,103.60 and 74,138.40 is: 111,373.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,287.20 : 116,103.60 = 74,138.40 : x
  2. Step 2: Convert to fraction form
    77,287.20/116,103.60 = 74,138.40/x
  3. Step 3: Cross multiply
    77,287.20x = 116,103.60 × 74,138.40
  4. Step 4: Simplify right side
    77,287.20x = 8,607,735,138.24
  5. Step 5: Solve for x
    x = 8,607,735,138.24/77,287.20
  6. Step 6: Final answer
    x = 111,373.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.